diff --git a/src/depot.cpp b/src/depot.cpp
--- a/src/depot.cpp
+++ b/src/depot.cpp
@@ -44,12 +44,6 @@ Depot::~Depot()
 	DeleteWindowById(WC_VEHICLE_DEPOT, this->xy);
 
 	/* Delete the depot list */
-	VehicleType vt;
-	switch (GetTileType(this->xy)) {
-		default: NOT_REACHED();
-		case MP_RAILWAY: vt = VEH_TRAIN; break;
-		case MP_ROAD:    vt = VEH_ROAD;  break;
-		case MP_WATER:   vt = VEH_SHIP;  break;
-	}
+	VehicleType vt = GetDepotVehicleType(this->xy);
 	DeleteWindowById(GetWindowClassForVehicleType(vt), VehicleListIdentifier(VL_DEPOT_LIST, vt, GetTileOwner(this->xy), this->index).Pack());
 }
diff --git a/src/depot_cmd.cpp b/src/depot_cmd.cpp
--- a/src/depot_cmd.cpp
+++ b/src/depot_cmd.cpp
@@ -76,13 +76,7 @@ CommandCost CmdRenameDepot(TileIndex til
 		SetWindowDirty(WC_VEHICLE_DEPOT, d->xy);
 
 		/* Update the depot list */
-		VehicleType vt;
-		switch (GetTileType(d->xy)) {
-			default: NOT_REACHED();
-			case MP_RAILWAY: vt = VEH_TRAIN; break;
-			case MP_ROAD:    vt = VEH_ROAD;  break;
-			case MP_WATER:   vt = VEH_SHIP;  break;
-		}
+		VehicleType vt = GetDepotVehicleType(d->xy);
 		SetWindowDirty(GetWindowClassForVehicleType(vt), VehicleListIdentifier(VL_DEPOT_LIST, vt, GetTileOwner(d->xy), d->index).Pack());
 	}
 	return CommandCost();
diff --git a/src/depot_map.h b/src/depot_map.h
--- a/src/depot_map.h
+++ b/src/depot_map.h
@@ -55,4 +55,21 @@ static inline DepotID GetDepotIndex(Tile
 	return _m[t].m2;
 }
 
+/**
+ * Get the type of vehicles that can use a depot
+ * @param t The tile
+ * @pre IsRailDepotTile(t) || IsRoadDepotTile(t) || IsShipDepotTile(t) || IsTileType(t, MP_STATION)
+ * @return the type of vehicles that can use the depot
+ */
+static inline VehicleType GetDepotVehicleType(TileIndex t)
+{
+	switch (GetTileType(t)) {
+		default: NOT_REACHED();
+		case MP_RAILWAY: return VEH_TRAIN;
+		case MP_ROAD:    return VEH_ROAD;
+		case MP_WATER:   return VEH_SHIP;
+		case MP_STATION: return VEH_AIRCRAFT;
+	}
+}
+
 #endif /* DEPOT_MAP_H */
diff --git a/src/vehicle_cmd.cpp b/src/vehicle_cmd.cpp
--- a/src/vehicle_cmd.cpp
+++ b/src/vehicle_cmd.cpp
@@ -85,14 +85,7 @@ CommandCost CmdBuildVehicle(TileIndex ti
 	/* Elementary check for valid location. */
 	if (!IsDepotTile(tile) || !IsTileOwner(tile, _current_company)) return CMD_ERROR;
 
-	VehicleType type;
-	switch (GetTileType(tile)) {
-		case MP_RAILWAY: type = VEH_TRAIN;    break;
-		case MP_ROAD:    type = VEH_ROAD;     break;
-		case MP_WATER:   type = VEH_SHIP;     break;
-		case MP_STATION: type = VEH_AIRCRAFT; break;
-		default: NOT_REACHED(); // Safe due to IsDepotTile()
-	}
+	VehicleType type = GetDepotVehicleType(tile);
 
 	/* Validate the engine type. */
 	EngineID eid = GB(p1, 0, 16);